نتایج جستجو برای: gpr 119

تعداد نتایج: 17385  

2001
L. van Kempen H. Sahli J. Brooks J. Cornelis

One of the main problems with the interpretation of GPR data is the strong ground reflection, obscuring signals arriving from just underneath the surface. The strength of this reflection can be reduced by deconvolution. This technique is especially useful when GPR is used to detect buried landmines. Parametric and non parametric time variant estimators are used for clutter characterization. Wav...

2013
David Ayala-Cabrera Manuel Herrera Joaquín Izquierdo Silvia J. Ocaña-Levario Rafael Pérez-García

This paper addresses the problem of leakage in water distribution systems through the use of ground penetrating radar (GPR) as a nondestructive method. Laboratory tests are performed to extract features of water leakage from the obtained GPR images. Moreover, a test in a real-world urban system under real conditions is performed. Feature extraction is performed by interpreting GPR images with t...

2017
Alessandro Fedeli Matteo Pastorino Andrea Randazzo

Ground Penetrating Radar (GPR) systems are nowadays standard inspection tools in several application areas, such as subsurface prospecting, civil engineering and cultural heritage monitoring. Usually, the raw output of GPR is provided as a B-scan, which has to be further processed in order to extract the needed information about the inspected scene. In this framework, inverse-scattering-based a...

ژورنال: علوم زمین 2011

آب­های زیرسطحی، حفرات و ساختارهای مجزای دفن‌شده در ژرفاهای کم، به‌دلیل تفاوت آشکار در ویژگی‌های الکتریکی و الکترومغناطیسی با محیط دربرگیرنده خود، به‎خوبی توسط روش‎های مقاومت ویژه و GPR قابل آشکارسازی هستند. در این پژوهش، با در نظر گرفتن 3 نیمرخ...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2011
Catherine Hofler Michael R Koelle

Proteins containing the G protein regulator (GPR) domain bind the major neural G protein Gα(o) in vitro. However, the biological functions of GPR proteins in neurons remain undefined, and based on the in vitro activities of GPR proteins it is unclear whether these proteins activate or inhibit G protein signaling in vivo. We found that the conserved GPR domain protein AGS-3 activates Gα(o) signa...

2015
Daniela De Benedetto Ruggiero Quarto Annamaria Castrignanò Domenico A. Palumbo

Over the last few years high-resolution geophysical techniques, in particular ground-penetrating radar (GPR), have been used in agricultural applications for assessing soil water content variation in a non-invasive way. However, the wide use of GPR is greatly limited by the data processing complexity. In this paper, a quantitative analysis of GPR data is proposed. The data were collected with 2...

2015
L. Sold M. Huss A. Eichler M. Schwikowski M. Hoelzle

The spatial representation of accumulation measurements is a major limitation for current glacier mass balance monitoring approaches. Here, we present a method for estimating annual accumulation rates on a temperate Alpine glacier based on the interpretation of internal reflection horizons (IRHs) in helicopter-borne ground-penetrating radar (GPR) data. For each individual GPR measurement, the s...

2016
Giovanni E. Ferreira Rodrigo G. P. Barreto Caroline C. Robinson Rodrigo D. M. Plentz Marcelo F. Silva

Objectives To systematically review randomized controlled trials that assessed the effects of Global Postural Reeducation (GPR) on patient-reported outcomes in conditions of the musculoskeletal system. Method An electronic search of MEDLINE (via PubMed), EMBASE, Cochrane CENTRAL, and SciELO was performed from their inception to June 2015. Randomized controlled trials that analyzed pain and pati...

2012
Caroline Dorn Niklas Linde Tanguy Le Borgne Olivier Bour Maria Klepikova

[1] Investigations of solute transport in fractured rock aquifers often rely on tracer test data acquired at a limited number of observation points. Such data do not, by themselves, allow detailed assessments of the spreading of the injected tracer plume. To better understand the transport behavior in a granitic aquifer, we combine tracer test data with single-hole ground-penetrating radar (GPR...

2009
Andrea FISCHER

In order to develop and evaluate a method for the determination of glacier volume from ice-thickness data, the volume of Schaufelferner, Austria, is calculated (1) by manual interpolation of ground-penetrating radar (GPR) data based on measurements at 36 locations in 1995, (2) by manual interpolation of 144 GPR measurements acquired for a higher-resolution estimate in 2003 and 2006, (3) by mult...

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